I really do make a living by laughing?啥意思?

I really do make a living by laughing?啥意思? make a living by 后跟－ing还是－do make a living by doing make a living是否可以省略by 把“Do you make a living by playing the violin?"加上时间状语las Do you make a living by playing the violin? the old man said Do you make a living by playing the violin?如何翻译? make a living by driving和make a living as a driver, make a living for...与make a living by的区别 make a living by doing sth.与make a living on doing sth.的区别 Really Do you make this sentence by yourself they are 【against】 make a living by selling flowers